Device for removing keys from shafting and pulleys.



si, Bumm Mli FUR BREWING KEYS FROM SHAFTING AND PULLBYS.

.PPLXUATIGN FILED MAY?, 1910. v

Patented Mar. 7,

UNITED STATES PATENT OFFICE.

JACOB BUTSCH, OF LYNNVILLE, INDIANA.

Specicaton uf Igetters Patent.

Patented Mar. 7, 1911.

Appunti fled my?, 191e. smal. nu. saam.

To all whom @It may concern:

Be it known that I, JACOB BU'rsoH, a citizen of the United States, residing at Lynnville, in the county of 'Warrick and State of Indiana, have invented a certain new and usefullinprovement in Devices for Removing Keysvfrom Shafting and Pulleys; and I do hereby declare the following to be a. full, clear, and exact description of the same, ret'- erence being had to the accompanying drawings, forming a part of this specification, and to he figures and letters of reference marked thereon.

This invention relates to devices for facilitating the removal of keys employed for connecting shafting and pulleys, {1y-wheels, etc., and which are ordinarily rei'noved by a relative longitudinal movement.

The objects of the invention are to provide a simple and convenient device, the use and operation of which will be readily conv prehended and which s capable of wide range of vusefulness to meet various conditions and arrangements of pulleys, shafting, etc.

The invention consists in certain novel de tails of construction and combinations and arrangements of parts, all as will be now iescribed and pointed out more particularly in the appended claims.

Referring to the accompanying drawingss-l `igure 1 is an elevation of the device in'position to assist in the removal of a key from -a pulley and shaft, the ,latter being indicated diagralnn'iatically. Fig. 2 is a top plan view of the device with the shaft and key in dotted lines, and Fig. 3 is a perspective View of the key gripping end of the device showing the shape of the gripping jaws.

Lil/:c letters of reference in the several figures indicate the saine parts.

The body of the device is in the form of a vise or key gripping member, preferably embodying crosseddevers or arms A pivotally connected 'together at B and having their shorter ends formed into key-gripping jaws C. The key-gripping jaws preferably have biting edges, elongated transversely, as shown in Fig. 3, so. as to grip thekey in a manner not only `calculated to prevent slip ping, but also to `'prevent swinging or pivotal action of the device with the gripping points as 'a center. For clamping the jaws on thekey the arms A are conveniently connected by a transverse bolt D, on one end of which vis an adjusting nutd, whereby the aims may be drawn. together and the gripv ping jaws set up with any desired degree of pressure, so to insure a proper holding action,

(bviousiy, the relative length of the ends of the arms on opposite sides of the pivotal point shouid be made such :is to insure o sufcient hold on the key, and to this end the transverse boit or vise screw is preferably located some distance away from the pivot to give an increased leverage. The outer or longer arms of the members A are extended some distance beyond the vise screw and at their extremities are provided with bearings for the cross-head E, said bearings being conveniently open bearings f formed on the in- ,ner edges of transverse extensions F of the Vmembers A. There may be, as shown, a plurality of such bearings for a purpose which will presently appear. v

The crosshead E is provided centrally with a transverse threaded aperture in which works a lon screw G, the inner end of .which is somewhat pointed as at g and its outer headed end squared or formed for .the reception of a wrench or power appliance as at g', whereby the screw may be turned.

In making use of the device, the body or vise jaws are securely clamped on the key, as indicated in the drawings with the trans verse projections F in line with the shaft. The crosshead is then placed in position with 'the end of the yscrew bearino on the end of the shaftefter which sufiicicnt power is applied to the screw to tighten the device and exert a considerable pressure on the key itself, tending to withdraw it longitudinally. If the key is easily movable-it may-be removed by continuing to turn the screw, but in most instances it is found desirable at this point to strike the pulley or part held to the shaft by the key, with a hannnerand in a direction reverse to the direction in .which the key is being4 removed. The shock of the blow will usually besniicient to slightly loosen the pulley on the key and shaft, whereupon by further turning the screw the key may be easily withldrawn,

By prviding`a plurality of bearings for the crosshead, the pressure of the with drawing screw maybe brought to bear at.

the axes of shafts of diiferent size ,and this 1s desirable especially as shutting usually is provided with a central recess or'center.

insufficient o in which the screw may conveniently [ind' its bearing.

By the provision of elongated gripping edges on the jaws the tendency of the device to rotate about the gripping point when the f pressure of the wit'lnlrawing screw is brought to bear, is to a great extent overcome Ibut should any 'tendency to rotate about the gripping point manifest itself, the body v. or vise member may be held or braced from any suitable external point, although this; will not ordimirily be found. to be necessary, as the length of the members A is such that they can be easily held by hand to prevent them from getting out of alinement, even should the ippling edges of the device be r t is purpose. A further advantage in the particular construction illus trated results from the employment of a relatively long withdrawing screw and the location of the crosshead and its bearings a considerable distance from the gripping jaws, for with this arrangement it becomes possible toreach and remove keys located a considerable distance from the end of a shaft and thisfeature is of particular advant e where the device finds its held of usefu ness in connection with agricultural machinery, threshers, etc., in which there is little or no uniformity followed in the location of pulleys on the shafts. L

The device is an exceedingly simple and handy structure well adapted for universal shop and ield pur oses.

Having thus describe my invention, what I claim as new and desire to secure by Letters Patent of the United States isl. In a device Euch as described, the combination withmembers pivot-ally connected together and having at one side of the pivotal point cooperating elongated gri ping Iiaws and at the opposite side of sai pivotal point transverse extensions having bearings therein for a crosshead, and a transverse screw for 'holding the jaws in gripping position, of a crosshead removably mounted in said bearings and a withdrawing screw threaded in said crosshead and adapt ed to coperate with the end of the shaft carrying the key to be Withdrawn.

2. In a device such as described the combination with a vise member embodying pivotally connected jaws having transversely elongated gripping edges, a jaw holding screw for securing the jaws' in gripping position and extensions having open bearings .therein, of a crosshead removably mounted in said open bearings and a relativel long withdrawing screw threaded throng said crosshead and having its inner end pointed and its outer end provided with a head for the application of a power member.

3. In a device such as described, the combination with the members A pivotally oonnected together and having on their shorter ends key gripping jaws and on their longer ends transverse projections F provided with open bearings. in their inner edges, of a' transverse screw for holding the jaws in closed position, a crosshead removably seating in said open bearings, and an elongated withdrawing screw threaded through said crosshead, substantially as described.

JAo'oB cursen.

Vitnesses:

J. M. ZIMMERMAN, M. W RICE. 

